CA1111684A - Device for viewing residual light in the visible and the near infrared spectrum - Google Patents
Device for viewing residual light in the visible and the near infrared spectrumInfo
- Publication number
- CA1111684A CA1111684A CA326,976A CA326976A CA1111684A CA 1111684 A CA1111684 A CA 1111684A CA 326976 A CA326976 A CA 326976A CA 1111684 A CA1111684 A CA 1111684A
- Authority
- CA
- Canada
- Prior art keywords
- axis
- ocular
- collimator
- parallel
- path
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/12—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices with means for image conversion or intensification
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/16—Housings; Caps; Mountings; Supports, e.g. with counterweight
- G02B23/18—Housings; Caps; Mountings; Supports, e.g. with counterweight for binocular arrangements
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Telescopes (AREA)
- Eye Examination Apparatus (AREA)
Abstract
Title:
Device for viewing residual light in the visible and the near infrared spectrum.
Abstract of the disclosure:
A device for biocular viewing of residual light in the visible and the near infrared spectrum, comprising an optical input system, at least one singular image intensifier of the non-inverting type, a collimator, two ocular paths parallel with the axis of the device, and an optical output system associated with each ocular path, which is arranged so that a single image inversion is performed in each ocular path.
Device for viewing residual light in the visible and the near infrared spectrum.
Abstract of the disclosure:
A device for biocular viewing of residual light in the visible and the near infrared spectrum, comprising an optical input system, at least one singular image intensifier of the non-inverting type, a collimator, two ocular paths parallel with the axis of the device, and an optical output system associated with each ocular path, which is arranged so that a single image inversion is performed in each ocular path.
Description
6~
The invention relates to a device fox biocular viewing of residual Light in the visible and the near infrared spectrum, which device comprises a~ optical input system, a~ least one image intensifier, a collimator, two ocular pa~hs parallel with the axis o~ the device, and an optical output system associated with each ocular path.
Such a device is used, for example, as a passi~e biocular night glass.
It is an object of the lnvention to design such a device to have a short leng~h, a very low weight and a limited height, and to have its centre of gravity located optimally near to the ocular end of the device, so that the device may be worn as a pair of goggles.
To achieve this object, in accordance wi~h the invention a singular image intensifier of the non-inverting type is present and each optical output system is arranged so ~hat a single image inversion is performed in each ocular path.
:
IL6~
In accordance with the Lnvention, a device of extremely short length is achieved if the image intensifier c~,mprises an in~ensifier tube of the so-called ~CP proximity .ocus type, which tube is conspicuous for its slight length.
For reducing the total len~th of the device even more, in accordance ~ith the invention a reflector surface may be mounted in each ocular path between the colllmator and an object lens disposed in the respective path and between this object lens and an eyepiece disposed in this path, which reflector surfaces are mountPd in parallel with each other so that no im~ge inversion is cauged thereby and the beam emanating from each eyepiece is parallel wi-kh the axis of the device.
To llmit the height of the device, in accordance wit~ the invention means may be provided for per,mitting an adjustment of the distance between the ocular paths so that a constant distance is maintained between the axis of the collimator and the plane through the optical axes of the eyepiecas.
The invention will be described in greater detail hereinafter with reference to the accompanying drawings, in which:
Fig. 1 shows schematically the arrangement of a device according ~ to the invention, in which the upper half shows the optical principle of the invention in so fa~ as image formation and inversion are concerned, and the lower halr shows an embodiment by means whereof a favourable weight, a slight length and height and a proper location of the centre of gravity are achievedi and Fig. 2 shows an embodiment of the means for adjusting the dlstance between the exit pupils.
. . .
B~
As appears from Fig. 1, ~esidual light incident on the device is projected by the lens 1 constituting the optical input system onto an image intensifier 2. The ligh~ from image intensifier 2 impinges upon a collimator 3 from which a parallel light beam emanates that can be viewed with an optical output system comprislng an object lens 4 and an eyepiece 5.
As stated above, the upper part of Fig. 1 shsws the optical principle of the invention in so far as image foxmation and inversion are concerned an~ it will be clear that the light emanating from colli-mator 3 can be viewed through two separa~e ocular pa~hs each including an optical output system 4, 5. It is observed that the exit pupil of the device should be larger than the pupil of the eye. The aperture of the collimator 3 should be selected so that the exit pupil of the device is fully filled with light. As a result thereof, the combination of collimator 3 and optical output system 4, 5 does not produce luminance losses relative to viewi~g the lntensifier tube with the naked eye or a singular maqnifying glass, irrespective of the xelative transverse displacement of tne axes of collima~or and optical output system.
Therefore, the distance between the axes of tne optical output systems, i.e. the interpupillary distance, may be varied without lu~inance losses or reduction of the image quality. In view of the fact that the device according to the invention is intended for wearing as a pair of goggles, it is preferr~d to make such a variation possible.
~ realization thereof is shown in Fig. 2.
As appears from this figure, a plate 8 is mounted on the housir.g (not shown), which plate includes two elongated openings eacn associated with a rack 10.
As shown in the figure, the xacks 10 ~esh ~ith a toothed wheel 11 mounted on plate 8 and hence on the housing of the de~ice. Wheel 11 has an axis of rotation parallel with the axis of the device. Each rac~
further includes an elougated aperture 12 coacting with a pin 13 mounted S on the plate 8 and hence on the hous m g oI the device. This arrangement o the rac~s permits these racks to be displaced in parallel with each other ~hroush equal dis~ances in inward or outward direction. During such a displacement, the eyepiece 5 of each optical output s~stem associated with each ocular path is likewise displaced in inward or outward directlon.
Consequently, in thls manner it is possible to va~y the interpupillary distance.
During such a displacement, the other components o~ the optical output system are slmilarly displaced, which means that in each ocular path the mirror systems 6 and 7 and the object lens 4 disposed there-between (not shown in Fig. 2) are likewise displaced in inward or out-ward direction.
The arrangement o~ the optical output systems is selected so that the reflector surface~ 6 and 7 and the objact lens ~ (not shown in Fig. 2) in each ocular path perform a corresponding displacement~ the beams emanating rrom the collimator 3 being displaced in paraLlel with each other over the collimator surface above and below, respectively, the collimator axis, as shown in Fig. 2.
In this manner an optimal utilization o~ the collimator surface is achieved. Moreover, as will be readily clear, an adjust~ent by means of such a structure is extremely simpLe, reliable and accurate.
:``
It will be clear that the above embodiment of the adjusting means is described only by way of example and that ~hese adjusting means may be arranged in several other manners while maintaining the linear displacement o the exit pupils with the corresponding linear d~splace-msnt of the beams emanating from the collimator over the surface thereofln a manner described above.
As another object of the invention is to shorten the length of the device and to have the centre of gravity or the device located a~
near to the rear as possible, it is preferred so to speak to fol~ up each ocular pa~h. This is shown in the lower hali of Fig. l m e parallel beam e~anating ~rom collimato~ 3 L~pinges upon a first reflector surface 6 which projects this incident Iight throuqh the object lens 4 upon a second reflector surface 7. The light reflected from this mirror surface 7 can reach the eye of the viewer through the eyepiece 5. It will be clear that by this "olded" structure the length of the respective ocular path is arastically ~educed, which results in a reduction of the total length of the device and in a dlsplacement of its centre of gravity towards the ocular end thereof.
Although in Fig. 1 the refLectox surraces 6 and 7 are shown as flat mirrors, Lt is possLble to use prisms instead.
In the arrangement described above, the Lmage intensifier tube
The invention relates to a device fox biocular viewing of residual Light in the visible and the near infrared spectrum, which device comprises a~ optical input system, a~ least one image intensifier, a collimator, two ocular pa~hs parallel with the axis o~ the device, and an optical output system associated with each ocular path.
Such a device is used, for example, as a passi~e biocular night glass.
It is an object of the lnvention to design such a device to have a short leng~h, a very low weight and a limited height, and to have its centre of gravity located optimally near to the ocular end of the device, so that the device may be worn as a pair of goggles.
To achieve this object, in accordance wi~h the invention a singular image intensifier of the non-inverting type is present and each optical output system is arranged so ~hat a single image inversion is performed in each ocular path.
:
IL6~
In accordance with the Lnvention, a device of extremely short length is achieved if the image intensifier c~,mprises an in~ensifier tube of the so-called ~CP proximity .ocus type, which tube is conspicuous for its slight length.
For reducing the total len~th of the device even more, in accordance ~ith the invention a reflector surface may be mounted in each ocular path between the colllmator and an object lens disposed in the respective path and between this object lens and an eyepiece disposed in this path, which reflector surfaces are mountPd in parallel with each other so that no im~ge inversion is cauged thereby and the beam emanating from each eyepiece is parallel wi-kh the axis of the device.
To llmit the height of the device, in accordance wit~ the invention means may be provided for per,mitting an adjustment of the distance between the ocular paths so that a constant distance is maintained between the axis of the collimator and the plane through the optical axes of the eyepiecas.
The invention will be described in greater detail hereinafter with reference to the accompanying drawings, in which:
Fig. 1 shows schematically the arrangement of a device according ~ to the invention, in which the upper half shows the optical principle of the invention in so fa~ as image formation and inversion are concerned, and the lower halr shows an embodiment by means whereof a favourable weight, a slight length and height and a proper location of the centre of gravity are achievedi and Fig. 2 shows an embodiment of the means for adjusting the dlstance between the exit pupils.
. . .
B~
As appears from Fig. 1, ~esidual light incident on the device is projected by the lens 1 constituting the optical input system onto an image intensifier 2. The ligh~ from image intensifier 2 impinges upon a collimator 3 from which a parallel light beam emanates that can be viewed with an optical output system comprislng an object lens 4 and an eyepiece 5.
As stated above, the upper part of Fig. 1 shsws the optical principle of the invention in so far as image foxmation and inversion are concerned an~ it will be clear that the light emanating from colli-mator 3 can be viewed through two separa~e ocular pa~hs each including an optical output system 4, 5. It is observed that the exit pupil of the device should be larger than the pupil of the eye. The aperture of the collimator 3 should be selected so that the exit pupil of the device is fully filled with light. As a result thereof, the combination of collimator 3 and optical output system 4, 5 does not produce luminance losses relative to viewi~g the lntensifier tube with the naked eye or a singular maqnifying glass, irrespective of the xelative transverse displacement of tne axes of collima~or and optical output system.
Therefore, the distance between the axes of tne optical output systems, i.e. the interpupillary distance, may be varied without lu~inance losses or reduction of the image quality. In view of the fact that the device according to the invention is intended for wearing as a pair of goggles, it is preferr~d to make such a variation possible.
~ realization thereof is shown in Fig. 2.
As appears from this figure, a plate 8 is mounted on the housir.g (not shown), which plate includes two elongated openings eacn associated with a rack 10.
As shown in the figure, the xacks 10 ~esh ~ith a toothed wheel 11 mounted on plate 8 and hence on the housing of the de~ice. Wheel 11 has an axis of rotation parallel with the axis of the device. Each rac~
further includes an elougated aperture 12 coacting with a pin 13 mounted S on the plate 8 and hence on the hous m g oI the device. This arrangement o the rac~s permits these racks to be displaced in parallel with each other ~hroush equal dis~ances in inward or outward direction. During such a displacement, the eyepiece 5 of each optical output s~stem associated with each ocular path is likewise displaced in inward or outward directlon.
Consequently, in thls manner it is possible to va~y the interpupillary distance.
During such a displacement, the other components o~ the optical output system are slmilarly displaced, which means that in each ocular path the mirror systems 6 and 7 and the object lens 4 disposed there-between (not shown in Fig. 2) are likewise displaced in inward or out-ward direction.
The arrangement o~ the optical output systems is selected so that the reflector surface~ 6 and 7 and the objact lens ~ (not shown in Fig. 2) in each ocular path perform a corresponding displacement~ the beams emanating rrom the collimator 3 being displaced in paraLlel with each other over the collimator surface above and below, respectively, the collimator axis, as shown in Fig. 2.
In this manner an optimal utilization o~ the collimator surface is achieved. Moreover, as will be readily clear, an adjust~ent by means of such a structure is extremely simpLe, reliable and accurate.
:``
It will be clear that the above embodiment of the adjusting means is described only by way of example and that ~hese adjusting means may be arranged in several other manners while maintaining the linear displacement o the exit pupils with the corresponding linear d~splace-msnt of the beams emanating from the collimator over the surface thereofln a manner described above.
As another object of the invention is to shorten the length of the device and to have the centre of gravity or the device located a~
near to the rear as possible, it is preferred so to speak to fol~ up each ocular pa~h. This is shown in the lower hali of Fig. l m e parallel beam e~anating ~rom collimato~ 3 L~pinges upon a first reflector surface 6 which projects this incident Iight throuqh the object lens 4 upon a second reflector surface 7. The light reflected from this mirror surface 7 can reach the eye of the viewer through the eyepiece 5. It will be clear that by this "olded" structure the length of the respective ocular path is arastically ~educed, which results in a reduction of the total length of the device and in a dlsplacement of its centre of gravity towards the ocular end thereof.
Although in Fig. 1 the refLectox surraces 6 and 7 are shown as flat mirrors, Lt is possLble to use prisms instead.
In the arrangement described above, the Lmage intensifier tube
2 is a readily exchangeable mcdule preferably incLudLng an integrated high voltage unit. In view of the contemplated slight length of the device and, particula~ly, the slight lenqth of the tube itself, this high voltage unit may, in principle, be mounted as a cyLinder around the object lens or the collimator. In connection with the desired location - of the centre of gravity of the device L, i5 preferred to mou~t the : high voltage unLt around the collLmator.
:
It will be clear, moreover, -that the entire de~ica may be construc-ted in modular form so as to perm~t a simple assembling of the device and a stepwise adjust m g of the dif~erent modules. For example, it is then possible to first ensure that the two ocular paths extend parallel with the axis of the device and to subsequently, and fully independently thereof, adjust the collimator 3.
:
It will be clear, moreover, -that the entire de~ica may be construc-ted in modular form so as to perm~t a simple assembling of the device and a stepwise adjust m g of the dif~erent modules. For example, it is then possible to first ensure that the two ocular paths extend parallel with the axis of the device and to subsequently, and fully independently thereof, adjust the collimator 3.
Claims (5)
1. A device for biocular viewing of residual light in the visible and the near infrared spectrum, said device comprising an optical input system, at least one image intensifier, a collimator, two ocular paths parallel with the axis of the device, and an optical output system associated with each ocular path, characterized in that one singular image intensifier of the non-inverting type is present and that each optical output system is arranged so that a single image inversion is performed in each ocular path.
2. A device according to claim 1, characterized in that said image intensifier comprises an intensifier tube of the MCP proximity focus type.
3. A device according to claim 1, characterized in that a reflec-tor surface is mounted in each ocular path between the collimator and an object lens disposed in the respective path and between said object lens and an eyepiece disposed in said path, said reflector surfaces being mounted in parallel with each other so that no image inversion is caused thereby and the beam emanating from each eyepiece is parallel with the axis of the device.
4. A device according to claim 1, characterized by means for permitting an adjustment of the distance between the ocular paths so that a constant distance is maintained between the axis of the collimator and the plane through the optical axes of the exit pupils.
5. A device according to claim 4, characterized that said adjusting means comprise a toothed wheel mounted for rotation on the housing of the device, the central axis of said wheel being parallel with the axis of the device and said wheel meshing with two racks mounted in a plane normal to the axis of the device for movement in opposite, parallel directions relative to each other, said racks being coupled to each op-tical output system so that a change in the distance between the exit pupils is accompanied with a displacement parallel thereto of the beams emanating from the collimator over the surface thereof above and below, respectively, the collimator axis.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7804990A NL7804990A (en) | 1978-05-09 | 1978-05-09 | DEVICE FOR SENSING RESIDUAL LIGHT IN THE VISIBLE AND NEAR INFRARED SPECTRUM. |
| NL7804990 | 1978-05-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1111684A true CA1111684A (en) | 1981-11-03 |
Family
ID=19830805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA326,976A Expired CA1111684A (en) | 1978-05-09 | 1979-05-04 | Device for viewing residual light in the visible and the near infrared spectrum |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US4266129A (en) |
| JP (1) | JPS54149656A (en) |
| KR (1) | KR840000245B1 (en) |
| AR (1) | AR225610A1 (en) |
| BR (1) | BR7902789A (en) |
| CA (1) | CA1111684A (en) |
| CH (1) | CH640953A5 (en) |
| DE (1) | DE2917205C2 (en) |
| FR (1) | FR2425652B1 (en) |
| GB (1) | GB2020943B (en) |
| IT (1) | IT1118617B (en) |
| NL (1) | NL7804990A (en) |
| SE (1) | SE440414B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4392710A (en) | 1979-11-22 | 1983-07-12 | Pilkington P. E. Limited | Optical apparatus |
| SE442559B (en) * | 1980-02-07 | 1986-01-13 | Bofors Ab | BINOCULAR NIGHT VIEWS |
| US4653879A (en) * | 1985-03-01 | 1987-03-31 | Fjw Industries, Inc. | Compact see-through night vision goggles |
| US4682029A (en) * | 1985-10-22 | 1987-07-21 | Magnavox Government And Industrial Electronics Company | Stereoscopic infrared imager having a time-shared detector array |
| US4786154A (en) * | 1986-12-16 | 1988-11-22 | Fantone Stephen D | Enhanced-image operating microscope |
| US4786155A (en) * | 1986-12-16 | 1988-11-22 | Fantone Stephen D | Operating microscope providing an image of an obscured object |
| US5079416A (en) * | 1987-10-27 | 1992-01-07 | Night Vision General Partnership | Compact see-through night vision goggles |
| US5434704A (en) * | 1992-08-14 | 1995-07-18 | Litton Systems, Inc. | Night vision weapon sight |
| US6075644A (en) * | 1996-12-20 | 2000-06-13 | Night Vision General Partnership | Panoramic night vision goggles |
| GB2418925A (en) * | 2004-08-04 | 2006-04-12 | Reckitt Benckiser Inc | Solid treatment block compositions |
| US7381952B2 (en) * | 2004-09-09 | 2008-06-03 | Flir Systems, Inc. | Multiple camera systems and methods |
| US7740085B2 (en) * | 2005-12-13 | 2010-06-22 | Roussy Raymond J | Vibratory apparatus for a rotary-vibratory drill |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7209150U (en) * | 1972-08-10 | Eltro Gmbh & Co | Passive night vision device | |
| DE1093581B (en) * | 1959-02-13 | 1960-11-24 | Robert Dowling | Binoculars |
| DE1181383B (en) * | 1961-09-06 | 1964-11-12 | Joseph Bradbury & Sons Ltd | Lifting device for vehicles with a platform that can be raised and lowered |
| NL6503866A (en) * | 1965-03-26 | 1966-09-27 | ||
| JPS4222641Y1 (en) * | 1966-04-06 | 1967-12-23 | ||
| US3584931A (en) * | 1967-11-02 | 1971-06-15 | Licentia Gmbh | Binocular viewing instrument |
| DE6607760U (en) * | 1967-11-08 | 1971-04-15 | Licentia Gmbh | BINOCULAR VISION DEVICE |
| US3737667A (en) * | 1971-08-18 | 1973-06-05 | B Babb | Electro-optical viewing device |
| US3906277A (en) * | 1972-05-05 | 1975-09-16 | Rca Corp | Electron tube having a semiconductor coated metal anode electrode to prevent electron bombardment stimulated desorption of contaminants therefrom |
| US3868504A (en) * | 1973-09-20 | 1975-02-25 | Us Army | Modular biocular eyepiece for thermal image systems |
| JPS5144466A (en) * | 1974-10-14 | 1976-04-16 | Matsushita Electric Ind Co Ltd | IMEEJIINTENSHIFUAIA |
| JPS5812977B2 (en) * | 1975-11-14 | 1983-03-11 | 株式会社東芝 | image can |
| GB1511982A (en) * | 1976-01-07 | 1978-05-24 | Optische Ind De Oude Delft Nv | Night glass |
| US4020376A (en) * | 1976-03-05 | 1977-04-26 | The United States Of America As Represented By The Secretary Of The Army | Miniature flat panel two microchannel plate picture element array image intensifier tube |
-
1978
- 1978-05-09 NL NL7804990A patent/NL7804990A/en not_active Application Discontinuation
-
1979
- 1979-04-25 CH CH387879A patent/CH640953A5/en not_active IP Right Cessation
- 1979-04-27 SE SE7903759A patent/SE440414B/en not_active IP Right Cessation
- 1979-04-27 US US06/033,836 patent/US4266129A/en not_active Expired - Lifetime
- 1979-04-27 DE DE2917205A patent/DE2917205C2/en not_active Expired
- 1979-05-04 CA CA326,976A patent/CA1111684A/en not_active Expired
- 1979-05-07 JP JP5484579A patent/JPS54149656A/en active Granted
- 1979-05-08 FR FR7911594A patent/FR2425652B1/en not_active Expired
- 1979-05-08 BR BR7902789A patent/BR7902789A/en unknown
- 1979-05-09 GB GB7916124A patent/GB2020943B/en not_active Expired
- 1979-05-09 AR AR276460A patent/AR225610A1/en active
- 1979-05-28 IT IT67965/79A patent/IT1118617B/en active
- 1979-06-25 KR KR797902100A patent/KR840000245B1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| FR2425652B1 (en) | 1986-03-14 |
| GB2020943B (en) | 1982-07-07 |
| AR225610A1 (en) | 1982-04-15 |
| NL7804990A (en) | 1979-11-13 |
| SE440414B (en) | 1985-07-29 |
| IT7967965A0 (en) | 1979-05-08 |
| JPH039443B2 (en) | 1991-02-08 |
| KR840000245B1 (en) | 1984-03-07 |
| CH640953A5 (en) | 1984-01-31 |
| GB2020943A (en) | 1979-11-21 |
| DE2917205A1 (en) | 1979-11-22 |
| SE7903759L (en) | 1979-11-10 |
| JPS54149656A (en) | 1979-11-24 |
| IT1118617B (en) | 1986-03-03 |
| US4266129A (en) | 1981-05-05 |
| FR2425652A1 (en) | 1979-12-07 |
| BR7902789A (en) | 1979-11-27 |
| DE2917205C2 (en) | 1982-05-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |